PS Magazine - TB 43-PS-743
PS, The Preventative Maintenance Monthly
ISSUE 743
OCTOBER 2014
46
PS 743
OCT 14
47
PS 743
OCT 14
S
ome M1135 NBCRV Stryker maintenance folks are costing their units a lot of money by
guessing instead of troubleshooting.
They do a quick fix by replacing the sensor scanner assembly (SSA), NSN 6665-01-537-
2509, instead of doing the necessary troubleshooting to find the real problem. The SSA
costs $442,559, so it’s an expensive quick fix.
There are only two reasons to replace the SSA: if the platform circuit breaker continually
trips or if the SSA smokes or produces a burning smell.
If neither of those two symptoms is present, maintenance personnel need to follow the
troubleshooting found in WP 0028 in the joint service lightweight standoff chemical agent
detector’s (JSLSCAD) TM 3-6665-353-13&P (Apr 13) down to the lowest line replaceable
unit (LRU). That will be either the scanner assembly, NSN 6665-01-536-5638 or sensor
electronics module, NSN 6665-01-536-7953.
Once the fault is identified, replace the faulty LRU according to the maintenance
allocation chart (MAC).
To put it mildly, the lowest level LRUs are cheaper than SSAs—and more readily available,
for that matter.
M1135 NBCRV Stryker…
Troubleshoot
Before
Replacing SSA
see?
replacing
my LRU did
the trick!
and it
cost us a
whole lot
less, too!
Sorry you feel
bad. I’m guesSing
it’s your SSA…
WHAT!? Are you
trying to
bankrupt
us?! That’ll set us
back $400K!
…so I’m gonna
replace
it.
That
should do the
trick.
find out what’s
really
wrong!
R
ead
about
generator restarts,
battery acid, and
fiber optic
cables.
CoMunications
743 46-47.indd
1-2
9/3/14
10:37 AM
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